// IDAllocator.h code is copyrighted (C) 2010 by Dave Brotherstone

// This file is part of NotepadPro project
// Copyright (C)2023 mediv01 <mediv01@163.com>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// at your option any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.


#pragma once

class IDAllocator
{
public:
	IDAllocator(int start, int maximumID) : _start(start), _nextID(start), _maximumID(maximumID) {};

	/// Returns -1 if not enough available
	int allocate(int quantity) {
		int retVal = -1;

		if (_nextID + quantity <= _maximumID && quantity > 0)
		{
			retVal = _nextID;
			_nextID += quantity;
		}

		return retVal;
	};

	bool isInRange(int id) { return (id >= _start && id < _nextID); }

private:
	int _start = 0;
	int _nextID = 0;
	int _maximumID = 0;
};

